(BloombergOpinion) -- Last October, it felt like Procter & Gamble Co.'s annual meeting might end up being a turning point in the effort to revitalize the company behind brands such as Tide detergent and Crest toothpaste. Activist investor Nelson Peltz had been agitating for a spot on P&G's board as he called for a long list of changes, and the consumer-goods giant had spent big money to try secure enough votes to deny him a seat at the table...